- #1
mileena
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I am going to be taking a geometry assessment test. I have a problem with four of the 20 questions in the sample practice assessment test they provide. Specifically with the answers the Math Department gives at the bottom of the test. Before I confront them, please tell me if I am crazy. How can a college math department be wrong in such a simple subject?? I hope I am wrong.
http://www.losmedanos.edu/Groups/Math/web/documents/MicrosoftWord-26challengeinfopacket.pdf
Problem 3)
" Find the measure of the interior angles of a regular 5-gon. "
Their answer is 180 degrees
Is not the answer 540 degrees?? [(n-2) * 180] ?
Problem 7)
"Find the area of the equilateral triangle with side length of 10 yds. "
Their answer is 25 radical 3.
My answer is (25 radical 3) / 2 since the area of a triangle is (bh)/2
Problem 9b)
Can you look at the diagram from the link above. I might be wrong, but I think there is no way to know which leg of the larger triangle the 12" side of the smaller triangle corresponds to. Therefore, I can't find the ratio of lengths and then apply the Pythagorean Theorem to the smaller triangle.
Problem 17)
" Find the area of the circular garden, where the length of the fence around the garden is 62.8m. Round your answer to 1 decimal place. "
Their answer is 313.8 meters squared.
My answer is 314.0 meters squared (approximately equals 100pi)
[Also, problem 5 is wrong in that they neglected to provide the measurement of the other angle (90 degrees) in the answer.]
http://www.losmedanos.edu/Groups/Math/web/documents/MicrosoftWord-26challengeinfopacket.pdf
Problem 3)
" Find the measure of the interior angles of a regular 5-gon. "
Their answer is 180 degrees
Is not the answer 540 degrees?? [(n-2) * 180] ?
Problem 7)
"Find the area of the equilateral triangle with side length of 10 yds. "
Their answer is 25 radical 3.
My answer is (25 radical 3) / 2 since the area of a triangle is (bh)/2
Problem 9b)
Can you look at the diagram from the link above. I might be wrong, but I think there is no way to know which leg of the larger triangle the 12" side of the smaller triangle corresponds to. Therefore, I can't find the ratio of lengths and then apply the Pythagorean Theorem to the smaller triangle.
Problem 17)
" Find the area of the circular garden, where the length of the fence around the garden is 62.8m. Round your answer to 1 decimal place. "
Their answer is 313.8 meters squared.
My answer is 314.0 meters squared (approximately equals 100pi)
[Also, problem 5 is wrong in that they neglected to provide the measurement of the other angle (90 degrees) in the answer.]